Introduction Congratulations on your purchase of the Extech EX330 Meter. The EX330 offers AC/DC Voltage, AC/DC Current, Resistance, Diode, Continuity, non-contact Voltage Detection, Capacitance, Frequency, Duty Cycle, and Temperature (Type K) functions. Proper use and care of this meter will provide many years of reliable service.
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Expired or damaged batteries can cause cauterization on contact with the skin. Always, therefore, use suitable hand gloves in such cases See that the batteries are not short-circuited. Do not throw batteries into the fire. EX330-EN v5.0 06/14...
) (ohms) Farads (capacitance) mega (10 ) (ohms) Ohms Hertz (frequency) Volts Percent (duty ratio) Relative Alternating current AUTO Autoranging Direct current HOLD Display hold ºF Degrees Fahrenheit ºC Degrees Centigrade •))) Continuity Diode test Battery status EX330-EN v5.0 06/14...
NON-CONTACT AC VOLTAGE DETECTOR The EX330 can detect the presence of AC voltage (from 100 to 600VAC) simply by being held very near to a voltage source. WARNING: Test the AC voltage detector on a known live circuit before each use.
Insert the red test lead banana plug into the positive V jack. Touch the black test probe tip to the negative side of the circuit. Touch the red test probe tip to the positive side of the circuit. Read the voltage in the display. EX330-EN v5.0 06/14...
Touch the test probe tips across the circuit or component under test. It is best to disconnect one side of the circuit under test so the rest of the circuit will not interfere with the resistance reading. Read the resistance in the display. EX330-EN v5.0 06/14...
Touch the test leads to the capacitor to be tested. The test may take up to 3 minutes or more for large capacitors to charge. Wait until the readings settle before ending the test. Read the capacitance value in the display EX330-EN v5.0 06/14...
Press RANGE to step through the available ranges until the desired range is selected. To exit the Manual Ranging mode and return to Auto Range, press and hold the RANGE key for 2 seconds. Note: Manual range does not apply to Capacitance, Frequency or Temperature modes. EX330-EN v5.0 06/14...
USE ONLY FRESH BATTERIES OF THE RECOMMENDED SIZE AND TYPE. Remove old or weak batteries so they do not leak and damage the unit. IF THE METER IS TO BE STORED FOR A LONG PERIOD OF TIME, the batteries should be removed to prevent damage to the unit. EX330-EN v5.0 06/14...
WARNING: To avoid electric shock, do not operate the meter until the batteries and the fuses are in place and fastened securely. 1. Removable Rubber Holster 2. Meter 3. Battery 4. Fuses 5. Compartment Cover 6. Rubber Holster EX330-EN v5.0 06/14...
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Accuracy is stated at 65 F to 83 F (18 C to 28 C) and less than 75% RH. UL LISTED The UL mark does not indicate that this product has been evaluated for the accuracy of its readings. EX330-EN v5.0 06/14...
Note – Examples include switches in the fixed installation and some equipment for industrial use with permanent connection to the fixed installation. OVERVOLTAGE CATEGORY IV Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the installation. Note – Examples include electricity meters and primary over-current protection equipment EX330-EN v5.0 06/14...
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